If you want to be an agent, you'd better take an examination of these universities directly, or take an examination of the technical majors of famous schools, so that the National Security Bureau may be more easily selected when recruiting people.
Nowadays, the so-called research institutes are mostly responsible for intelligence collection and analysis, and they are regarded as agents. Public security bureaus at all levels have national security bureaus, which are agents. Public security bureaus at or below the county level have special agents (or political security departments), and political security police are special agents. The Intelligence Section/Security Section of the Army General Staff is a special agent.